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The placental mammal ancestor and the post-K-Pg radiation of placentals.
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The placental mammal ancestor and the post-K-Pg radiation of placentals.

Author: MA O'Leary Affiliation: Department of Anatomical Sciences, School of Medicine, HSC T-8 (040), Stony Brook University, Stony Brook, NY 11794-8081, USA. maureen.oleary@stonybrook.eduJI BlochJJ FlynnTJ GaudinA GiallombardoAll authors
Edition/Format: Article Article : English
Publication:Science (New York, N.Y.) 2013 Feb 8; 339(6120): 662-7
Database:From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
Other Databases: ElsevierBritish Library Serials
Summary:
To discover interordinal relationships of living and fossil placental mammals and the time of origin of placentals relative to the Cretaceous-Paleogene (K-Pg) boundary, we scored 4541 phenomic characters de novo for 86 fossil and living species. Combining these data with molecular sequences, we obtained a phylogenetic tree that, when calibrated with fossils, shows that crown clade Placentalia and placental orders  Read more...
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Document Type: Article
All Authors / Contributors: MA O'Leary Affiliation: Department of Anatomical Sciences, School of Medicine, HSC T-8 (040), Stony Brook University, Stony Brook, NY 11794-8081, USA. maureen.oleary@stonybrook.edu; JI Bloch; JJ Flynn; TJ Gaudin; A Giallombardo; NP Giannini; SL Goldberg; BP Kraatz; ZX Luo; J Meng; X Ni; MJ Novacek; FA Perini; ZS Randall; GW Rougier; EJ Sargis; MT Silcox; NB Simmons; M Spaulding; PM Velazco; M Weksler; JR Wible; AL Cirranello
ISSN:0036-8075
Language Note: English
Unique Identifier: 827160921
Awards:

Abstract:

To discover interordinal relationships of living and fossil placental mammals and the time of origin of placentals relative to the Cretaceous-Paleogene (K-Pg) boundary, we scored 4541 phenomic characters de novo for 86 fossil and living species. Combining these data with molecular sequences, we obtained a phylogenetic tree that, when calibrated with fossils, shows that crown clade Placentalia and placental orders originated after the K-Pg boundary. Many nodes discovered using molecular data are upheld, but phenomic signals overturn molecular signals to show Sundatheria (Dermoptera + Scandentia) as the sister taxon of Primates, a close link between Proboscidea (elephants) and Sirenia (sea cows), and the monophyly of echolocating Chiroptera (bats). Our tree suggests that Placentalia first split into Xenarthra and Epitheria; extinct New World species are the oldest members of Afrotheria.

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